b2Contact Class
The class manages contact between two shapes. A contact exists for each overlapping AABB in the broad-phase (except if filtered). Therefore a contact object may exist that has no contact points. An instance of this class is automatically created as a parameter of PhysicsScene/onBeginContact and PhysicsScene/onEndContact event.
Example:
this.onBeginContact = function(contact)
{
// get the first contact
var current = contact;
while (current) {
// get the bodies in the contact
var bodyA = current.getBodyA();
var bodyB = current.getBodyB();
...
// get the next contact (they can be more contacts during the one step)
current = current.getNext();
}
}
Item Index
Methods
getBodyA
() B2Contact
Get the first body in the contact.
Returns:
B2Contact: The first body in the contact
Example:
// handle all current contacts in the world
this._world.onBeginContact = function(sender, contact)
{
// get the first body in the contact
var bodyA = contact.getBodyA();
// get the second body in the contact
var bodyB = contact.getBodyB();
};
getBodyB
() B2Contact
Get the second body in the contact.
Returns:
B2Contact: The second body in the contact.
Example:
// handle all current contacts in the world
this._world.onBeginContact = function(sender, contact)
{
// get the first body in the contact
var bodyA = contact.getBodyA();
// get the second body in the contact
var bodyB = contact.getBodyB();
};
getNext
() B2Contact
Get the next contact in the world's contact list.
Returns:
B2Contact: Next contact in the list or null if no other is available.
Example:
// handle all current contacts in the world
....onBeginContact = function(contact)
{
// set first contact to current
var current = contact;
// if there is no contact in current variable break the loop
while (current != null)
{
// other operations with b2Contact object
...
// get next contact
current = current.getNext();
}
};
Properties
enabled
Boolean
Enable/disable this contact. This can be used inside the pre-solve contact listener. The contact is only disabled for the current time step (or sub-step in continuous collisions).